The bug
Minecarts are able to snap to rails below them even if they would pass through a block to do so, assuming the block isn't a full height block.
This happens with any non-full-height block, including:
Slabs
Soul sand
Grass paths
Farmland
Tripwire (The cart passes through without activating it)
Chests
Carpets
How to reproduce
Place a rail
Place a non-full-height block above it
Place a full block above that block
Place a rail on that block
Place a minecart on that rail
Break the block below the rail
→ ❌ The cart will snap through to the rail below it, even though there is a block in the way
Example
[media][media]
Related issues
is duplicated by
MC-9735
Minecarts don't stack, instead moving into the same block.
MC-11200
TNT Minecart Collision Bug
MC-53719
Minecarts are buggy when in cobwebs
MC-85439
Minecart Immediately Teleports to Rail
MC-99179
Minecarts can pass through non-full height blocks
MC-132141
Minecarts passing through some blocks
MC-137767
Minecarts Teleport through non-full blocks to tracks
MC-164437
Villagers in minecarts fall thru farmland when rails are below it
MC-186482
Minecarts Get Sucked through Bottom Slabs
MC-202378
Minecarts don't drop through cobwebs correctly
MC-272546
(infdev 20100618 -> now) Minecart can go through all incomplete blocks like soul sand, etc..
relates to
MC-191723
Minecarts cannot attach to rails while moving across soul sand or mud
MC-2783
Minecarts sometimes appear off the track
MC-103933
Stacked minecarts have variable visual behavior based on the presence of a rail
MC-275758
Minecarts no longer pass through non-full-height blocks when snapping to rails
Attachments
Comments
migrated
migrated
Confirmed in 13w02b.
migrated
Still a concern in 1.7.5
migrated
Still a concern in 14w10c
migrated
Confirmed for 14w11b
migrated
Is this the same bug, they can teleport through tripwires if there is a rail below?
FaRo1
Very likely.
pokechu22
migrated
Confirmed for 18w10d
Jack McKalling
Also add carpets to the list in the description. Because minecarts also pass through carpets when snapping to the rail below.
Although I really like this behaviour.
FaRo1
Also affects lava, flowing lava, the lower part of cobwebs, sideways end rods, chorus plant, stairs if the minecart falls onto the lower part, trapdoors, enchanting tables, end portal frames, end portals, daylight detectors, turtle eggs, conduits, flower pots, skulls and the lower part of bubble columns.
But I don't think that should all be listed in the description, it already says "any non-full-height block, including [list]". Btw, I tested none of the blocks in the list, I only looked at the list of blocks in the wiki.
migrated
i can confirm that this bug is still a bug in 1.13.2
migrated
it also works on non full height blocks that are waterlogged, the waterlogged state does nothing to this bugs function
migrated
In the full flow of the conversation, did someone point out specific use cases where this is a "bad thing"? I've seen various use cases including https://youtu.be/wd8l6AsAgCM where this is used to solve specific problems to do with minecarts.
muzikbike
Affects 18w46a
Jack McKalling
Confirmed for 18w48a
Jack McKalling
Confirmed for 18w49a
Jack McKalling
Confirmed for 18w50a
Jack McKalling
Confirmed for 19w02a
Jack McKalling
Confirmed for 19w03c
Jack McKalling
Comfirmed for 19w04a
Jack McKalling
Confirmed for 19w04b
Jack McKalling
Confirmed for 19w09a
Behavioural note: it seems the minecart can't go through such a block anymore like it used to. It would snap through the slab (other affected blocks not tested) and get stuck, as opposed to continue on the rail. I'm unsure whether this is caused by another bug, as there are other new bugs with minecarts.
Jack McKalling
Confirmed for 19w11b
Jack McKalling
Confirmed for 19w12b
Jack McKalling
Confirmed for 19w13b
Jack McKalling
Confirmed for 1.14 pre-1
Jack McKalling
Confirmed for 1.14 pre-3
Jack McKalling
Confirmed for 1.14 pre-5
Jack McKalling
Confirmed for 1.14
Jack McKalling
Confirmed for 1.14.1 pre-1
Jack McKalling
Confirmed for 1.14.1 pre-2
Jack McKalling
Confirmed for 1.14.1
TheBoy358
Confirmed in 19w45b.
ampolive
Can confirm in 1.17.1 Pre-release 1. Also affects powder snow.
WoutZeester1
Also happens with trapdoors. Video attached.
migrated
Still an issue as of 1.18.1
migrated
Can confirm as of 22w03a
pulpetti
Still in 1.18.2 and 22w12a.
migrated
Still an issue as of 1.19.1
NBG-bootmgr
Can confirm in 1.19.2 and Minecarts can go through sculk sensors and shrieker
Brain81505
Can confirm in 23w06a and 1.19.3
migrated
Can confirm in 1.19.4
migrated
This applies to all variants of minecarts, normal, hopper minecart, chest minecart, tnt minecart and furnace minecart.
[Mod] Jingy
Fixed with the 24w34a minecart experiment:
[media]